Brillouin Optical Correlation Domain Reflectometry with Double Frequency Modulation and Phase Modulation

被引：6
作者：
Matsuoka, Ora [1 ]
Kishi, Masato [1 ]
Hotate, Kazuo [1 ]
机构：
[1] Univ Tokyo, Sch Engn, Dept Elect Engn & Informat Syst, Bunkyo Ku, Tokyo 1138656, Japan
来源：
23RD INTERNATIONAL CONFERENCE ON OPTICAL FIBRE SENSORS | 2014年 / 9157卷
关键词：
Brillouin scattering; BOCDR; distributed measurement; optical fiber sensing; FIBER; PROPOSAL; SCHEME;
D O I：
10.1117/12.2059432
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We propose and experimentally demonstrate a Brillouin optical correlation domain reflectometry system with double frequency modulation and phase modulation. Double frequency modulation onto the laser is used for expanding the measurement range, and phase modulation onto the reference lightwave is used for reducing background noise to enhance resolution and strain dynamic range. A section with 15 cm length and 7000 mu epsilon strain was detected in 1250 m single mode fiber with 5.2 cm nominal spatial resolution.
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页数：4
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